Originally Posted by telf

Hi all,

1st post on the forum but I've been a lurker for a while!

As per the title it's an ST170 on a 54 plate with around 60k on clock.

Problem is a bit hard to describe but I'll give it a shot.

If you drive the car very quietly (gear change approx 2k) all seems not to bad just a bit jerky but if you press on the accelerator a bit harder the car just dies basically and you need to coast to a stop. You can't rev it as pressing the pedal has no effect what so ever. You need to let the car sit for 10-15mins before it even considers restarting then it will idle but not rev until it feels like it and you can set off again but slowly until it decides to cut out again.....so repeat the above! this is fairly annoying so its parked up!

I have taken the imrc box off and change the tp121 transistor and put it back together (the were no fault codes relating to this but an auto electrician said it wasn't working correctly and causing the issue) the imrc works fine, when started it moves to the closed position and when about 5.5k and above it opens. I have also tried running the car with this disconnected and it made no difference.

The battery light seems to be coming when higher up the rev range then will stay on for a bit a low revs and the dash lights dim and brighten as they please. the voltage across the battery is approx 14V when idling but I haven't checked its output when up the rev range yet.

Any ideas guys?!

Any specialist garages about or recommended ones?

Anything else to check?

The car is standard apart from a k&n panel filter which has been on the car for 2 years.

Cheers
David